Common uses: plastic tableware, meat trays, to-go "clam shell" containers. Cups, meat trays, and other containers that have any food or drink on or in it are not acceptable.

Plastic #7: Other

Common uses: certain kinds of food containers and Tupperware. This plastic category, as its name of "other" implies, is any plastic other than the named #1-#6 plastic types. These containers can be any of the several different types of plastic polymers.